[MacPorts] #37399: librsvg: Add gdk-pixbuf2 dependency

[MacPorts]

#37399: librsvg: Add gdk-pixbuf2 dependency
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  Reporter:  robsonpeixoto@…  |      Owner:  pixilla@…
      Type:  defect           |     Status:  new
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.1.2
Resolution:                   |   Keywords:  haspatch
      Port:  librsvg          |
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Comment (by cal@…):

 In that case gdk-pixbuf2 should be pulled in by `libgsf` -> `gconf` ->
 `gtk2` -> `gdk-pixbuf2`. I wonder why that doesn't happen for you.

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Ticket URL: <https://trac.macports.org/ticket/37399#comment:4>
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